Logic Circuits

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30V from 5V converter
Touch switch
Analog and digital electronic thermometer with LM35
remote control circuit
RIAA Corrector
SCR Phase Control Speed Control/Dimmer
TMB-1 Tri-Mode Buffer Amplifier Box
Using a real time clock with a microcontroller
SASS 2400 Low-Volume Wet Air Sampler
Altec 1566 vacuum tube mic preamp and direct box
Five-way operation of the dynamic braking circuit